Which cockpit instrument warns pilots of excessive engine temperatures?

• A. The airspeed indicator
• B. The fuel gauge
• C. The engine temperature gauge
• D. The altimeter

Answer: (C)

The instrument designed to alert pilots about excessive engine temperatures is the engine temperature gauge. This gauge specifically monitors the temperatures of various components, such as the oil, coolant, or exhaust, depending on the aircraft type and engine configuration. By providing real-time data on engine temperatures, it helps pilots ensure that the engine operates within safe limits, thus preventing potential overheating that could lead to engine failure or other serious complications.

In contrast, other instruments serve different purposes. The airspeed indicator measures the aircraft’s speed relative to the surrounding air, while the fuel gauge indicates the current amount of fuel onboard the aircraft. The altimeter, on the other hand, provides information about the aircraft's altitude above sea level by measuring atmospheric pressure. None of these instruments are designed to monitor engine temperatures or provide warnings related to engine thermal conditions.